[dpdk-dev] [PATCH v2 3/5] net/mlx4: use function to get default RSS fields

[Adrien Mazarguil <adrien.mazarguil@6wind.com>]

Supported RSS hash fields are listed in function mlx4_conv_rss_hf() and
duplicated in mlx4_flow_prepare(); the latter are used when RSS is
requested without specifying any parameters.

This commit standardizes on mlx4_conv_rss_hf().

Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
---
 drivers/net/mlx4/mlx4_flow.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/mlx4/mlx4_flow.c b/drivers/net/mlx4/mlx4_flow.c
index 8b87b2989..7397dde26 100644
--- a/drivers/net/mlx4/mlx4_flow.c
+++ b/drivers/net/mlx4/mlx4_flow.c
@@ -105,6 +105,9 @@ struct mlx4_drop {
 /**
  * Convert DPDK RSS hash fields to their Verbs equivalent.
  *
+ * This function returns the supported (default) set when @p rss_hf has
+ * special value (uint64_t)-1.
+ *
  * @param rss_hf
  *   Hash fields in DPDK format (see struct rte_eth_rss_conf).
  *
@@ -154,6 +157,8 @@ mlx4_conv_rss_hf(uint64_t rss_hf)
 			seen |= rss_hf & in[i];
 			conv |= out[i];
 		}
+	if (rss_hf == (uint64_t)-1)
+		return conv;
 	if (!(rss_hf & ~seen))
 		return conv;
 	rte_errno = ENOTSUP;
@@ -759,10 +764,7 @@ mlx4_flow_prepare(struct priv *priv,
 				&(struct rte_eth_rss_conf){
 					.rss_key = mlx4_rss_hash_key_default,
 					.rss_key_len = MLX4_RSS_HASH_KEY_SIZE,
-					.rss_hf = (ETH_RSS_IPV4 |
-						   ETH_RSS_NONFRAG_IPV4_TCP |
-						   ETH_RSS_IPV6 |
-						   ETH_RSS_NONFRAG_IPV6_TCP),
+					.rss_hf = -1,
 				};
 			/* Sanity checks. */
 			for (i = 0; i < rss->num; ++i)
-- 
2.11.0